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  • INSTRUMENTATION AND PHOTOGRAPHY  (496)
  • STRUCTURAL MECHANICS  (323)
  • 1970-1974  (819)
  • 1971  (819)
Collection
Keywords
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  • 1970-1974  (819)
Year
  • 1
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    Optical devices, instrumentation: A compilation (1971)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Techniques and devices used to solve optical problems - compilation
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-SP-5941(01)
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
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    Electronic test instrumentation and techniques - A compilation (1971)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Compilation of electronic test instrumentation and techniques derived from NASA programs
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-SP-5907/02/
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 3
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    Selected photographic techniques, a compilation (1971)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: A selection has been made of methods, devices, and techniques developed in the field of photography during implementation of space and nuclear research projects. These items include many adaptations, variations, and modifications to standard hardware and practice, and should prove interesting to both amateur and professional photographers and photographic technicians. This compilation is divided into two sections. The first section presents techniques and devices that have been found useful in making photolab work simpler, more productive, and higher in quality. Section two deals with modifications to and special applications for existing photographic equipment.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-SP-5914(02)
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 4
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    Testing methods and techniques: Environmental testing: A compilation (1971)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Various devices and techniques are described for testing hardware and components in four special environments: low temperature, high temperature, high pressure, and vibration. Items ranging from an automatic calibrator for pressure transducers to a fixture for testing the susceptibility of materials to ignition by electric spark are included.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-SP-5945(01)
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    NASTRAN - A summary of the functions and capabilities of the NASA structural analysis computer system (1971)
    In:  CASI
    Details
    Publication Date: 2019-08-28
    Description: Description of general purpose digital computer program /NASTRAN/ for analysis of elastic structures under various loading conditions using finite element method approach
    Keywords: STRUCTURAL MECHANICS
    Type: NASA-SP-260
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    Buckling strength of structural plates (1971)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: Designs for determining buckling strength of structural plates for spacecraft
    Keywords: STRUCTURAL MECHANICS
    Type: NASA-SP-8068
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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    Testing methods and techniques: Strength of materials and components. A compilation (1971)
    In:  CASI
    Details
    Publication Date: 2019-08-27
    Description: The methods, techniques, and devices used in testing the mechanical properties of various materials are presented. Although metals and metal alloys are featured prominently, some of the items describe tests on a variety of other materials, from concrete to plastics. Many of the tests described are modifications of standard testing procedures, intended either to adapt them to different materials and conditions, or to make them more rapid and accurate. In either case, the approaches presented can result in considerable cost savings and improved quality control. The compilation is presented in two sections. The first deals specifically with material strength testing; the second treats the special category of fracture and fatigue testing.
    Keywords: STRUCTURAL MECHANICS
    Type: NASA-SP-5944(01)
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 8
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    A Stability Analysis of Cylindrical Panels Using a Finite Element Formulation (1971)
    In:  CASI
    Details
    Publication Date: 2019-08-14
    Description: A cylindrical finite element suitable for the linear stability analysis of cylindrical shells is developed. Energy principles and variational methods lead to a problem formulation which lends itself to physical interpretations of the governing matrices of the finite element. By properly grouping the terms which result from taking the second variation of the potential energy of the element, it is possible to identify three distinct types of matrices. The first matrix is the conventional stiffness matrix; the second is an initial stress stiffness matrix; and the third is an initial displacement stiffness matrix. With the assumption of linearity, the buckling problem is stated in terms of the classical linear real eigenvalue equation. This problem formulation was programmed on the CDC 6600 series computer. The computer program is used to analyze the buckling of a variety of structures. Columns, arches, flat plates and curved panels with and without cutouts are considered.
    Keywords: STRUCTURAL MECHANICS
    Type: NASA-TM-X-69998
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 9
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    Fundamental Mechanisms of Tensile Fracture in Aluminum Sheet Unidirectionally Reinforced with Boron Filament (1971)
    In:  CASI
    Details
    Publication Date: 2019-08-14
    Description: Results are presented from an experimental research effort to gain a more complete understanding of the physics of tensile fracture in unidirectionally reinforced B-Al composite sheet. By varying the degree of filament degradation resulting from fabrication, composite specimens were produced which failed in tension by the cumulative mode, the noncumulative mode, or by any desired combination of the two modes. Radiographic and acoustic emission techniques were combined to identify and physically describe a previously unrecognized fundamental fracture mechanism which was responsible for the noncumulative mode. The tensile strength of the composite was found to be severely limited by the noncumulative mechanism which involved the initiation and sustenance of a chain reaction of filament fractures at a relatively low stress level followed by ductile fracture of the matrix. The minimum average filament stress required for initiation of the fracture mechanism was shown to be approximately 170 ksi, and appeared to be independent of filament diameter, number of filament layers, and the identity of the matrix alloy.
    Keywords: STRUCTURAL MECHANICS
    Type: NASA-TM-X-67577
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 10
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    Mechanics of Fracture in Adhesive Joints (1971)
    In:  CASI
    Details
    Publication Date: 2019-08-14
    Description: Interdependence of continuum mechanics and physical chemistry in failure analysis of adhesives
    Keywords: STRUCTURAL MECHANICS
    Type: NASA-CR-121857 , UTEC-DO-71-155
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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